Abrading machine



A 04,6 @www @2,2 8

/NvENm-R May 2, 1933.

Patented May 2, .1933" GEORGE D'. Y.1i:L.nF1 JrcAN, or BEVERLY;MAssAC'HUsiauus AssIGNoR To UNITEDSHOE i., y

MACHINERY CORPORATION/for PATERSOMNEWJERSEY, A CORPORATION oF NEW .f `JERSEY Application ined July 12,

This invention relates `to yabrading machines and ,is hereinfillu'strated as embodied in a buiingy or scouringmachine of the type setV forth in UnitedStates Letters Patent No. 8'4-9,338,'granted April 2, 1907, on the application of A. W. Rogers, the illustrated builing tool. being of the type shown in United lStates Letters PatentfNo. 1,575,686, granted March `9, 1926, Aupon the application Fingerlike, krotatable buling tools `of the typeV shown in the last-mentioned patentare especially adapted for use in buing or scouring the breasts ofLouis heels and are 16 usually, for the sake of greater accessibility, mounted upon the free end of a rotatable spindle. Ink such ytools a replaceable labrasive, sleeve-likecoveris mounted upon a K supporting casing of'resilient material, ythe `casing being preferably kof* molded :rubber Yclosed atone end and secured at its other end to the .rotatable spindle by means var- 4vrangedto furnishI an air-tight-joint so that the tool may bey inflated to secure the soft V touch inherent in inflatedjbufngtools.

IWhen a tool of this type is arranged; to be inflated, .it is necessary toy provide `means for securingftogether, fthe closed or'.` free jouter `endfoffthetool andi the spindle in l 80 such a fashion that the casing Will be held against the axial stresses imparted lby the air pressure, and regardless of Whether or not it is infiated,fit'isnecessary to provide means for resisting the torsional stresses set l 85 up in the free endof the resilient support-y ing casing by the application of Workto the tool. Accordingly, one object of the-invention is to provide 'improved means' for insertion in ,the tool tov resistboth axial rand torsional stresses. v 1

With 4this in .vievv and in accordance with a feature of the invention, theV resilient casing of.4 the illustrated' tool is flanged vout- Wardlyat'one end andkis provided V,With a tubular insert to Which the other end ofk the resilient'c'asing is secured,l the insert being also outwardly rflanged,ataf-locality adjacent to the flange ofthe resilient casing to enable both the'resilient casing and the in- 5-0 sertjto kbeclamped, byjavcommon means,

, secured thereon.

` imRiunite MACHINE 1929. seriarnoji'mes; y,

againstashoulderon a driven spindle. The'y insert thus serves not only to prevent twisting of that endV portion of the resilient cas- -ing Which is remote from the spindle, but` it also resists such axial stresses as may be set up in the resilient casing by air pressure or otherwise. .v

Still other features of vthe invention are set forth in the accompanying )specification and 'claims,\reference being4 had to the accompanying drawing, in-which .f Fig. 1 isa vertical section through one of the heads of a Naumkeagv machine having my improved tool applied thereto; and

E Fig. -2 is a longitudinal sectionthrough the spindle of such a machine with theto'ol l The illustrated lOOl is designed for use in Naumkeag f machines, ksuch for example, as those Vof .the type illustrated in Letters Patent of the United .States No. 849,338 above `referred to, inv which a laterally extendingheadl() is provided with bearings V12 and 14, Withinwhich there is. supported for rotation a hollow spindle 16. Air under pressure may be supplied tothis spindle through a passage 18,` and a pulley 20 is provided for rotating the spindle An .abrading tool 21 is mounted upon the free end of the spindle16, the ktool 21 being designed for buiiing or scouring the breasts of Louis heels.

Thisspindle 16 is Lprovided with a shoulder 22 which is externally threaded at 24 ,and has a'dowel pin 26 depending therefrom. .The spindle isv alsoprovided'with a tubular extension or stub 28 upon which is sleeved a rigid tubular liningor anti-twistingmeans 30 of brass or the like fitting said stub and secured inside a molded rubber supporting, casing 32 as will be hereinafter described. This supporting casing vk32 is adapted toV receive `a sleeve-like abrasive cover 34 held frictionally thereon when the tool is inflated. -Itvvill be noted that the inner end ofthe tubular insert 30 is providedvvith a flange -4() perforated to receive lthe doWel-pin 26 so that said insert is held against rotation with respectto the spindle by reason-of itsinterlockingrelation ,with the spindle at 10@ a point removed from the outer and free end of the tool. The inner end of the resilient supporting casing 32 is also provided with an enlargement or flange 42 perforated to receive the dowel pin 26. A suitable washer 43 of rubber or the like may be interposed between the shoulder 22 and the flange 40 of the metallic insert to assist in maintaining an air-tight joint. An internally threaded collar 44is slipped on over the tool to clamp the casing and insert to the spindle,

' and to this end it is provided with an inturned flange 46 between which and the flange of the rubber casing 32 is inserted an anti-friction washer 48 of metal and having a rounded cross section to prevent cutting of the rubber.

Recesses 60 may be provided'in the reduced or inturned portion 46 for a spanner wrench to allow the collar 44 to be turned up tightly against the washer 48 so as to force the flange 40 against the washer L43 on the shoulder 22 of the spindle to make an air-tight joint.- The washer 48 so reduces the friction between the collar 44 and the flange 42 of the rubber casing 32 that a very considerable pressure may be exerted upon the lange of said Yrubber casing without setting up torsional stresses to twist this end of the` supporting casing with respect to the spindle.

There is thus provided a construction in which the tubular insert or anti-twisting means 30 is secured to the spindle, by interlocking engagement therewith at a point removed from the free end of the tool, both againstftorsional strains due to application of work to the tool and the axial stresses due to inflation of the tool, Vby the same clamping means which isutilized-to secure the upperend of the rubber supporting casing 32. This clamping means is also arranged, as will be noted, to make an airltight joint between the upper end of the supporting casing 32 and the rotatable hollow spindlel. Lateral openings 50 are provided in the insert beyond the outer end of thestub 28 to allow the air pressure to inflate the supporting casing 32 along a major portion of its length, so as thereby7 resiliently to support and retain lthe sleeve 34 of abrasive material. Y Y

In order that the tubular insert 30 may be intimately and permanentlybonded to the casing 32 over a limited area to resist'the torsionalstrains at the :outer end of the rubber casing 32, the latter is provided with a series of spaced flanges 52, each of which is perforated, as at 54,'so that the rubber of the casing 32 will flow through said perforations 54 in the vulcanization of the casing and be molded around `the flanges 52 so as to be intimatelyunited with the outer end of the tubular insert. VThe rubber not only adheres to the insert by reason of being vulcanized to it but is also interlocked with the metal of which the insert is composed. EX- perience has shown that the torsional stresses at the outer end of the resilient supporting casing 32 are ver considerable and that such stresses are e ectively' resisted by portions' of the rubber interlinked with the 4metal of theinsert.

In the use of the machine, the abrasive cover or sleeve 34 is applied to the tool while the casing 32 is deflated, in which condition said cover slips easily over the rubber casing and air pressure is then applied to inflate the casing so as frictionally to engage the abrasive sleeve 34 to hold it on the tool and so as to form a "cushion of air' between the rubber casing 32 and the metal insert 30. The machine is `then set in motion and the Work presented to the tool. If the tool is to be used for buiiing the` breasts of heels, the operator willapply the heel in a horizontal position to the tool and move it to and fro tobring all parts of the breast of the heel into contact with the tool. ,y The curvature of the tool is sufficiently less Athan that of the breast of` the heel to permit access to all yparts thereof. If the' heel 'is scalloped, the

operator `may then present the Vshoe in an inverted vertical position and apply the scalloped portionof the breastof the heel to the tool.

` Having thus described-my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. InV an abrading machine having a shouldered rotatable spindle, a buing tool adapted to be mounted on said spindle, said tool comprising a resilient supporting casing adapted to receive an abrasive cover and provided with an outwardly directed flange at one end, a similarly flanged insert within said casing and secured `to the casing near its other end, and common means for clamping said flanges against the shoulder of said spindle.

2. In an abrading machine having a shouldered rotatable spindle, a builing tool adapted' to be mounted upon said spindle, said tool comprising a resilient supporting casing adapted to receive an abrasive cover and provided with an outwardly directed flange at one end, a similarly flanged insert within said casing and secured to the casing near its other'end, positive interlocking means arranged to interengage and prevent relative rotation ofsaid flanges and said shoulder, ,and means for clam ing said flanges against the shoulder of sai spindle.

3. In an abrading machine having a rotatable shouldered spindle, a buing tool adapted to be mounted upon said spindle, said tool comprising a rubber supporting casing adapted to receive an abrasive cover flange at one end, a flanged insert within said easing extending` substantially to the free end thereof, and means for clamping the flanges of said members against the shoulder of said spindle, said insert being provided with an opening adjacent to the free end of the casing, which opening is filled with rubber of the supporting casing.

4. A bufiing tool adapted to be mounted upon a rotatable spindle having a shoulder, said tool comprising a molded rubber supporting casing adapted to receive an abrasive oover and provided with an outwardly directed flange at one end, a fianged insert Within said casing extending substantially to the other end thereof and means for clamping the iianges of said members against the shoulder of saidv spindle, said insert being provided With another flange adjacent to the'unclamped end of the casing and having openings extending substantially parallel y to the axis of the tool and filled with rubber of the supporting casing.`

5. In an abrading machine, a rotatably supported spindle having a free end,y a resilient casing adapted to receive and support an abrasive cover, the free end of said easing extending beyondthe free end of the spindle, a tubular insert Within said resilient easing secured to the free end of said casing and fitting the free end of said spindle, and means for clamping said tubular insert and the other end of said resilient casing to said spindle. t

In testimony whereof I have signed my name to this specification.

GEORGE D. ALDERMAN. 

